Steps to Boot Oracle Big Data Appliance Node into USB Rescue Mode using Grub Menu

Asset ID:	1-79-1570447.1
Update Date:	2017-11-22
Keywords:

Solution Type Predictive Self-Healing Sure

Solution 1570447.1 : Steps to Boot Oracle Big Data Appliance Node into USB Rescue Mode using Grub Menu

Applies to:

Big Data Appliance Hardware - Version All Versions and later
Linux x86-64

Purpose

This document provides steps on how to boot Oracle Big Data Appliance(BDA) into USB Rescue Mode using Grub Menu.

Scope

BDA Admin, Linux Admin

Details

Rescue Boot using Grub Menu

1) On BDA, Grub Menu has list of below boot entries as stated in /boot/grub/menu.lst

# pwd

/boot/grub

# ls -l menu*

lrwxrwxrwx 1 root root 11 Jul 8 17:55 menu.lst -> ./grub.conf

# more menu.lst | grep -i title

title Oracle Big Data Appliance - OS Disk as hd1 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - OS Disk as hd2 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - OS Disk as hd3 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - OS Disk as hd0 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - USB Rescue as hd0 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - USB Rescue as hd1 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - USB Rescue as hd2 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - USB Rescue as hd3 (2.6.32-200.21.1.el5uek)
title Oracle Big Data Appliance - Debug as hd1 (2.6.32-200.21.1.el5uek.debug)
title Oracle Big Data Appliance - Debug as hd2 (2.6.32-200.21.1.el5uek.debug)
title Oracle Big Data Appliance - Debug as hd3 (2.6.32-200.21.1.el5uek.debug)
title Oracle Big Data Appliance - Debug as hd0 (2.6.32-200.21.1.el5uek.debug)

2) Default timeout value set in /boot/grub/grub.conf is 5 seconds.

timeout=5

3) If booting the machine remotely then use Oracle Integrated Lights Out Manager (ILOM) Web interface Remote Console session to monitor the boot process.

4) Login to the machine via ssh, putty, or the ILOM GUI 'Remote Console' as root/password (default of welcome1) and from there reboot the node:

# reboot

After the reboot you can monitor the boot process via the ILOM GUI 'Remote Console'.

5) During reboot process below screen appears , in which you need to make the selection in 5 seconds.

Grub Main Menu

6) Use up/down arrows to select the boot mode.

7) Select 'Oracle Big Data Appliance - USB Rescue as hd0 (2.6.32-200.21.1.el5uek)' and hit 'Enter' key to boot the node into USB Rescue Mode.

Grub Rescue Mode

8) Once the node is booted in rescue mode,it will have booted into either the 'localhost' name or the 'Admin Hostname'. Check in the ILOM GUI 'Remote Console' to see what the node name is.

a) If node name is 'Admin Hostname' , then you can use ssh, putty, or the ILOM GUI 'Remote Console'.

ILOM Remote Web/Serial console is basically a replication of the video monitor output, so one cannot copy/paste to it where as in ssh/putty session you can. Using ssh/putty log back into the node with the 'Admin Hostname' or 'Admin Hostname' IP address. 'Admin Hostname' or 'Admin Hostname' IP address can be found on Node1 of the cluster in the file: /opt/oracle/BDAMammoth/mammoth-<rack1name>.params . Look for a space separated list for:
ETH0_NAMES=(...)
ETH0_IPS=(...)

b) If node name is localhost, then you will have access to the node only via the ILOM GUI 'Remote Console' .

Note:- In both cases login as root user and use the default password for the node which is generally welcome1.

9) Execute 'ls /' command to check boot is from a USB disk. If the boot is from USB disk then you see 'THIS_IS_THE_USB_DISK' in the ls output as below

Boot from USB

Oracle ILOM Web GUI

In a supported browser enter the IP Address or hostname for your Oracle Big Data Appliance server's ILOM. For list of browser's , Oracle ILOM supports refer to ILOM documentation .

The information about IP Address or hostname of ILOM's can be obtained from node 1 of the BDA in the file:

/opt/oracle/BDAMammoth/mammoth-<rack1name>.params

Look for a space separated list for:

ILOM_NAMES=(...)
ILOM_IPS=(...)

Note: If a security certificate error is displayed click on "Continue to this website (not recommended)." If a message "This Connection is Untrusted" is displayed then click on, "I Understand the Risks" and continue with the confirmations to log in.

In ILOM Version 3.0.*
------------------------
a) Click the Remote Control tab (on the top right)

b) You can then click the Redirection tab and click on 'Launch Remote Console' to monitor the progress of the server shutdown/startup.

Launch Remote Console in 3.0

In ILOM Version 3.1.*
------------------------

a) Expand 'Remote Control' in the left hand side menu and click on Redirection tab

b) Click Launch Remote Console to monitor the progress of the server shutdown/startup.

Launch Remote Console in 3.1

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